Disclosed herein is a marine propulsion device comprising a propulsion unit adapted to carry a propeller, a swivel bracket pivotally connected to the propulsion unit for relative steering movement therebetween about a steering axis, a link pivotally connected at one end to the swivel bracket about an axis transverse to the steering axis and having a laterally outwardly extending out-turned end, and a transom bracket adapted to be mounted on a transom of a boat, being pivotally connected to the swivel bracket for tilting movement about a tile axis transverse to the steering axis and parallel to the first mentioned transverse axis, and including a surface extending generally in the direction of intended boat travel and having therein a recess receiving and engaging the out-turned end of the link and biasing the link inwardly, which recess includes an endless main portion, a running position branch portion extending downwardly from the endless main portion, and a shallow water drive position branch portion extending downwardly and forwardly from the endless main portion of the recess at a point above the extension of the running position branch portion from the endless main portion of the recess, which endless main position of the recess also includes shoulder means for permitting movement of the link end in the endless main portion of the recess in one direction and preventing movement of the link end in the endless main portion of the recess in the direction opposite the one direction.